Blue-flame wick-stove.



B. BOEKENKAMP.

BLUE FLAME WIGK STOVE. APPLICATION FILED fiov. 11. 1912.

Patented 0013. 7, 1913.

3 SHEETS-SHEET 1..

E. BOEKENKAMP.

BLUE FLAME WIGK STOVE.

APPLIOATION FILED NOV. 11. 1912.

Patented Oct. 7, 1913.

3 SHEETS-SHEET 2.

m. 0 M 0 u a Patented Oct. 7, 1913.

3 SHEETS-SHEET 3.

igi/[ ncome UNITED Qs'ra'rns PATENT OFFICE.

. EDWARD BOEKENKAMP, OF ST. LOUIS, MISSOURI, ASSIGNOB T0 AMERICAN STOVECOMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF NEW'JEESEY.

BLUE-FLAME wick-strove.

Application filed'November 11, 1912. Serial No. 730,694.

To all whom it may concern:

"Be it known that I, EDWARD BOEKEN- KAMP, a citizen of the UnitedStates, residing at St. Louis, in the State of Missouri, have inventedcertain new and useful Improvements in BluefFlame Wick-Stoves, of whichthe following is a specification, reference being had therein to theaccompanying drawing.

This invention relates to improvements in blue flame wick stoves, andpertains to a burner particularly intended for use in cooking stoves.

The primary object of my invention is to produce a burner so constructedas to maintain a blue vapor generating flame at the lower end of theburner, which blue generating flame generates more vapor from the wickthan is consumed by the generator flame, that is, generatesan excess orsurplus amount of vapor from the wick, and to mix with this surplusvapor air-inproperquantities and convey this mixture or gas to andthrough 'a burner-cap at the top'o-f the device where it is lighted andmaintains a blue flame of considerable area and of maximum heatingefficiency.

Another object of my present invention is to combine with the featuresabove mentioned a form of burner-cap which cooperates with thesefeatures to produce a blue flame of considerable areaand of maximumheating efliciency and yet prevents the lighting or firing back of theflame through the burner-cap to the mixed vapor and air in the chimneybelow the burner-cap.

The accompanying drawing is one mechanical expression of the inventiveidea and in which- Figure 1 is a perspe ,.ive view of the burner whichembodies t e invention. Fig.

'wick. Fig. 3 is a central vertical sectional 2 is a relatively enlargedvertical central sectional view of a burner embodying the invention, thegenerating section being shown lifted for the initial lighting of theview of the burner with the generating section lowered and in positionfor the initial lighting. Fig. 4 is an inverted plan view of the topburner-cap. Fig. 5 is a horizontal sectional view on the line 55 of Fig.3.

The accompanying drawings are intended to show a construction 'ofa'burner which embodies one of the mechanical expressions of theinventive idea, which is the subjectmatter of this application and forwhich I seek a patent.

Referring now particularly to the drawings, 1 is a wick-tube of theusual constructlon, and which contains a wick 2, adapted to be raisedand lowered by any suitable wick-raising device 3. The inner and outerwalls of these wick-tubes are bulged respectively outwardly andinwardly, as illustrated at 4 and 5, to form an annular space into'whichthe wick 2 is caused to project. The bulged portions 4 and 5 formsupports and seats for the lower ends of the walls 6 and 7 of an annularchamber 8. The lower ends of these walls 6 and 7 are perforated, asshown at 9 and 10, that portion of the Walls above these perforationsbeing imperforated as shown. A centrally arranged bar 11 passes throughthe wick tube 1, a supporting spider 12 and a diaphragm 13, and has itsupper end 14 attached in any suitable manner to the upper closed'end 15of the inner wall or tube 6, the diaphragm 13 serves to close theinnertube (3, just a little above the perfo-rationslO. The outer raised orlowered and the annular chain b'e1f8 will be raised and lowered with therod, the object of which will be explained presently.

As shown, the upper endof the inner tube 6 preferably provided with aflange 20, which projects over the upper; end of the annular space orchamber 8, but above or apart from the said tube or wall 7 to form apassage 21, which places the chamber 8 in communication with thesurrounding space or chamber 22, formed by the surrroumling burnerchimney 23. This burner chimney 23 is seated in an annular cup-shapedmeniber 2 1, and this member is provided with a plurality of openings 25to establish co1nmunication between the surrounding atmosphere and thespace or chamber 22 between the chimney 23 and thechamber 8. Thischimney 23 can be lifted from the supporting member 24 if desired, butit ispreferably provided with a mica door 26,through which Patented Oct.'7, 1913,,

access may be had to the interior of the chimney and to the wick 2, whenthe chamber 8 is lifted, as above described.

, Surmounting'and spanning the top of the chimney 23 is a burner-cap 26;This burner cap has a plurality of elongated slots a, which are narrowerthan the thickness 01 I the metal I), which forms the cap proper. Thiscap is preferably provided with sev- "eral integral ribs 0 as shown inFig. 4:.

The operation of my improved burner is as follows: lVith the wick 2. 1nthe position shown in solid lines, Fig. 3, the door 26 is opened and thechamber 8 elevated to expose the wick. The wick is then, lighted throughthe door 26 and the chamber 8 lowered to position, as shown in Fig. 3,and

there is then produced an initial heating 9 and 10, and which maintainsa blue-flame in a manner well understood by those skilled in this art,the wick at this time being just high enough to generate the properamount of vapor to supply the initial heating flame.

After the parts have become heated, the wick is elevated to about theheight shown in dotted lines Fig. 3, which exposes a relatively largeportion of the wick, but the size of the flame is not materiallyaffected, be

cause the supply of air' being only at the lower ends of the tubes 6 and7, there is only sufficient air to maintain a small blue flame. \Viththe wick in this elevated position there is an excess or surplus amountof vapor generated from the wick by this flame which then becomes avapor generator flame, and the surplus vapor passes up between the tubes(3 and 7 through the passage 21. and enters the chamber 22 and outthrough the burner 26. The vapor after it enters the chamber 22 issupplied with a quantity of air through the passage 25 and thus createsa draft in the space of chamber 22, which causesthe air to mix With thevapor and causes the mixed air and vapor and gas to be carried by thisdraft through the narrow slots (1 of the burner 26 and being lighted atthe outside of the burner, produces a per fect blue flame ofconsiderable area and with a maximum heating efliciency, andparticularly adapted for cooking purposes.

The object of having the initial heating is twofold. First, to heat upthe parts of the burner to subsequently enable the carrying on orcontinuation of the generation of a surplus amount 'of vapor for theburner 26, for it is found thatthis vapor cannotbe lighted if theburner-ca is cold, and hence it is necessary to first eat the burner-cap26 before the combustible mixture or gas is fed thereto. I find thatthis type of burnerrequires a burner-cap which will afford theleastpossible obstruction to the flow of vapor and yet will not lightback or fire back through the burner-cap. I find that the perforatedplate will not produce the desired result, but that a burner-cap havingelongated slits which are narrow than the thickness of the [metal inwhich the slits are formed will produce the desired result and will notlight or fire back into the-chimney. Also after a long time ofexperimental work and devising and changing of parts, I find to producea blue-flame at the burner-cap in a burner of this type that thegenerating flame must be a blue flame and I conceive that the essentialfeatures of this invention are the combining of means for producing agenerating blue flame which produces an excess amount of va or, mixingair with this.

excess vapor and eedingit through a blue flame burner-cap.

Having thus described my invention, what I claim and desire to secure byLetters Patcut is:

1. A burner of the type described com.- prising a chimney, a blue flamevaporgencrating burner within and at the lower end of the'chimney, thesaid blue flame burner comprising vertically arranged inner and outertubes having the perforations at their lower ends only, a wick extendingbetween the perforated walls, the chimney having air passages, and thetop of the chimney provided with a blue flame burner-cap.

2. A burner of the type described, comprising a chimney, a blue flamevapor generating burner within the lower end of the chimneyand'comprising concentrically arranged tubes spaced apart to receive awick between their lower ends, the lower portion of the tubes beingperforated, the upper end of the space between the tubes incommunication with the interior of the chimney, a deflector flangeprojectin over this space between the tubes and 'a blue flame burner capat the upper end of the chimney.

In testimony whereof .I hereunto aflix my signature in the presence of.two witnesses.

EDWARD BOEKENKAMP.

Witnesses:

L. STOGKHOM,- O. H. GULTHER.

